CSS LLC’s Applied Optoelectronics AAOI Stock Holding History

CSS LLC’s Portfolio AAOI Stock Details AAOI Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$1.27M	Sell	15,000 -18,800	-56%	-$1.2M	0.06%	250
2025 Q4	$1.18M	Hold	33,800	–	–	0.05%	282
2025 Q3	$876K	Hold	33,800	–	–	0.04%	364
2025 Q2	$868K	Buy	33,800 +5,000	+17%	+$80.9K	0.04%	372
2025 Q1	$442K	Buy	28,800 +17,500	+155%	+$440K	0.02%	517
2024 Q4	$417K	Hold	11,300	–	–	0.02%	614
2024 Q3	$162K	Hold	11,300	–	–	0.01%	679
2024 Q2	$93.7K	Buy	+11,300	New	+$124K	﹤0.01%	761
2021 Q1	–	Sell	-35,100	Closed	-$299K	–	910
2020 Q4	$299K	Hold	35,100	–	–	0.01%	567
2020 Q3	$395K	Hold	35,100	–	–	0.02%	458
2020 Q2	$381K	Buy	35,100 +5,000	+17%	+$45.8K	0.02%	414
2020 Q1	$229K	Hold	30,100	–	–	0.02%	409
2019 Q4	$357K	Hold	30,100	–	–	0.02%	405
2019 Q3	$338K	Buy	30,100 +100	+0.3%	+$1K	0.02%	363
2019 Q2	$308K	Buy	30,000 +5,000	+20%	+$53.5K	0.02%	375
2019 Q1	$305K	Buy	+25,000	New	+$377K	0.02%	369

Other funds holding AAOI

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

OAM

Oberweis Asset Management Lisle, Illinois $3.39B AUM 105.5% 1-Year Est. Return

Jane Street New York $777B AUM 61.18% 1-Year Est. Return

D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

CSS LLC's AAOI Position: Q1 2026 in Review

CSS LLC opened a new position in Applied Optoelectronics (AAOI) in Q1 2026: 3,128 shares worth $265K. The stake represents 0.01% of the portfolio and ranks #689 among its holdings. This is a return to the name: CSS LLC previously reported a position in AAOI as recently as Q4 2024.

CSS LLC first reported a position in AAOI in Q4 2024 and has held it in 2 quarters since. The position peaked at $2.71M in Q4 2024. 375 funds tracked by Wall St. Rank hold AAOI as of Q1 2026.

CSS LLC held 3,128 shares of Applied Optoelectronics worth $265K as of Q1 2026.
Applied Optoelectronics was a new CSS LLC position in Q1 2026.
Applied Optoelectronics made up 0.01% of CSS LLC's portfolio in Q1 2026, its #689 holding.
CSS LLC first reported a position in Applied Optoelectronics in Q4 2024 and has held it in 2 quarters since.
CSS LLC's Applied Optoelectronics position peaked at $2.71M in Q4 2024.
375 funds tracked by Wall St. Rank held Applied Optoelectronics as of Q1 2026.

Based on CSS LLC's 13F filing for Q1 2026, filed 15 May 2026.